When the car temperature light comes ON or starts to flash . And Coolant Level Light Troubleshooting

Car Temperature Light Flashing Red
Possible Causes:
Should I drive a car if the temperature light is flashing red?
What does car red coolant light mean?
car coolant light comes on, but the car is not overheating.
car temperature light comes up at the cold start but goes away after a restart.
When the car temperature light comes on or starts to flash, you need to stop, allow the engine to cool down, and check the cooling level. Follow this guide on how to check the car engine coolant level.
If your car temperature light is flashing, it means the coolant level is low, or the coolant level sensor is faulty. On the other hand, if the temperature light is always on (not flashing), it usually means the engine is overheating.
Either way, do not drive if the coolant temperature light stays on or is flashing. If you do decide to drive, make sure the engine is not overheating.
Sometimes car temperature light flashes intermittently. For example, the temperature light flashes when you first start the car but stops flashing after the engine is warmed up or if the engine is restarted.
If the car runs great with no overheating issues, the problem usually is electrical such as a faulty temperature sensor mounted on the coolant reservoir.
Pullover as soon as it is safe to do so and turn off the engine. Allow the engine to cool down, then check the engine coolant level. If the engine coolant level is low, add engine coolant.
Restart the vehicle and check if the temperature light has turned off. If the temperature light keeps flashing, check if the cooling fan is spinning by looking at it. Do not touch the cooling fan.
Possible Causes
Car temperature light for any of the following reasons:
Defective coolant level sensor.
Coolant level is low.
Other possible but less likely causes include:
Engine is overheating.
Damaged wire harness to a temperature sensor
Faulty ECU
Bad sender for the temp sender.
Typically, when your car temperature light stays on or is flashing, you will not get a DTC code if you read codes with a generic OBD-II scanner. Instead, use a car OBD-II scanner. Follow this guide on how to diagnose car engine problems.
Should I drive a car if the temperature light is flashing red?
No. Do not drive if the temperature light is flashing. If the engine overheats and you continue to drive, you will cause expensive damage to the engine. You may blow a head gasket, or the engine may seize up.
Car temperature light most likely is flashing due to a faulty temperature sensor, but there is no way of knowing what is wrong without diagnosing the problem. If it is an electrical issue, the car may run fine, but you need to get the car diagnosed first. If you are not sure, see an auto mechanic.
We do not recommend that you drive the vehicle, call a mechanic, and ask for advice.
What does car red coolant light mean?
If the red coolant light stays on when the engine is running, it means that the Engine Control Unit (ECU) has detected a cooling system problem. The engine may have overheated, or a sensor is operating out of range.
In some rare cases, car red coolant light may flash or stay on due to an electrical problem such as a faulty ECU or instrument cluster, but those problems are rare.
Car coolant light comes on, but the car is not overheating?
One of the most common problems with the vehicles is that the coolant light comes on or flashes, but the car is not overheating. This problem is usually caused due to a faulty temperature sensor or a damaged wire harness.
Car temperature light comes up at the cold start but goes away after a restart?
You most likely have a low engine coolant level. After the engine is started and the coolant warms up, the coolant level on the reservoir can rise, which is enough to turn off the temperature light.
If the coolant level is correct, replace the sensor on the engine coolant reservoir. In many cases, the sensor is integrated into the coolant reservoir and requires the whole reservoir to be replaced.
If the temperature light stays on, read the fault codes with a Car scanner. Also, check the voltage at the sensor connector. Typically, you should get 5 volts with the engine on.

[@Dilloln]

How old are you?

[@amethysttadpole]

Is flashing vs solid meaning true for all vehicles? We have a Prius v and it recently flashes every once in a while for 5 seconds or less and then goes back off. Usually after we’ve been driving for over 30min. Coolant level is fine, no leaks that we can see. It started doing it after we took it in to get the brakes checked, could be coincidence but I wonder if a sensor got jostled.